Android App and Design

I guess this post starts off as a question. How are the iOS and Android apps coded? Are they all unified in code and built for multi-platform or are they done individually.

Reason I ask is that if they are done using the latter, then I could spend some time to do some mock-up application changes that would more suit Android and its design. Would this be something that could help?

The mobile apps are coded in React Native, which means they are using the same code base.

I thought that was the case. It does make sense. I’ll see if I can dig into React Native to see if I can help. Thanks for the response.